Obama Says Rape is 'Not okay- And It Has To Stop' in Grammys message

http://www.huffingtonpost.com/2015/02/08/obama-grammys-rape_n_6641922.html?utm_hp_ref=mostpopular

(I am obsessed w the Grammies and found this and the talk about no more abuse was very dramtic for the Grammys)

He says on a recording "it's not okay- and it has to stop"
Going on to say that it was on us to "create culture where violence isn't tolerated, where survivors are supported, and where all our young people-men and women- can go as far as their talents and their dreams will take them"

"It's on us" is something he is using for his public awareness campaign. Trying to "end" sexual assault at college campuses by enlisting support of sports stars/celebs. Asking fans to contribute to the effort.

In the video 1/5 women have been raped 1/4 have experinced domestic violence.

I was confused how contributing to this campaign would actually stop anything.